Fishing-tool for oil-wells.



PATENTED JAN. 30, 1906.

Wvwyi 1 P rn FISHING-TOOL FOR Oils-WELLS.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed September 25,1905. Serial No. 280,0 i5.

To to whom it may concern:

Be it known that I, ABRAM W. WOLF, a citizen of the United States of America, residing at Amos, in the county of Marion and State of West Virginia, have invented certain new and useful Improvements in Fishing-Tools for Oil- Wells, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in fishing-tools for oilwells and Artesian wells; and the invention has for its object to provide a novel form of fishing-tool wherein positive and reliable means are embodied for gripping the various parts of drilling-tools in order that they may be removed from a well independently of the drilling-bit should it become lodged at the bottom of the well.

It is a well-known fact that in drilling wells the tools employed often become lodged in the hole being drilled, this being caused very often immediately after a freshlydressed bit is being used. The bits which are forced downwardly by the various other tools become worn, and in order to maintain the size of the well-hole it is necessary that the tools and bit be removed in order that the bit can be dressed and sharpened. The new edges placed upon the bits at timesbecome impinged in the bottom of the well-hole or else engaged under a ledge of rock or become wedged in the bottom of the well-hole by a cave-in of rock. Various forms of fishing-tools have been devised for removing the tools and sometimes the bits after they have been caught; and the primary object of this invention is to provide a tool which can be employed for removing each section of the drilling-tools. These tools generally comprise a rope-socket, jars, an angerstem, and a bit, these various parts of the drilling-tool being connected together by a joint commonly known as a box-and-pin joint, the pin being a tapering screw-threaded projection which engages in the tapering screw-threaded recess formed in that part of the tool directly above it.

My invention aims to provide a fishing-tool which will engage each part of the drillingtools and rotate them, whereby they can be removed one at a time.

The detail construction of my improved fishing-tool will appear as the description-procoeds, reference being had therein to the ac companying drawings, forming a part of this specification, like numerals of reference designating like parts throughout the several views, in which- Figure 1 is a front elevation, partly broken away, illustrating my improved drilling-tool. Fig. 2 is a top plan view of the lower portion of the drilling-tool. Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 1; and Fig. 1 is a central longitudinal sectional view, partly broken away, showing the coupling device employed in connection with the fishingtool.

To put my invention into practice, my fishing-tool is preferably constructed of four parts, which are extremely simple in construction, strong and durable, and can be easily and quickly assembled.

The fishing-tool consists of a head 12, the upper end of which is provided with a tapering screw-threaded pin 12, adapted to engage in a conventional form of rope-socket, by which it may be raised and lowered in a manner similar to the ordinary drilling-tools employed in connection with oil and Artesian wells. The sides of the head 12 are provided with flattened surfaces 12 in order that a wrench may be placed upon the head to rotate the same. The bottom of the head 12 is provided with a contracted screw-threaded neck portion 12, and engaging this neck portion is a tubular member 1 of the same diameter as the head 12. The underneath face of the tubular member is provided with a series of ratchet-teeth 11, and the periphery of the tubular member adjacent to these ratchet-teeth is provided with flattened surfaces 11 to accommodate a wrench employed for tightening the tubular member upon the neck 12 of the head 12.

The tubular member 1 in its upper end is provided with a central bore 2 of a greater diameter than its normal bore 3, and in this tubular member is mounted a gripping-head 9, having a reduced stem portion 8 of the same diameter as the normal bore 3 of the tubular member. The upper end of the stem portion of the gripping-head is provided with a screw-threaded opening 7, in which engages a' screw-threaded stem 7 of a cap 5, this cap being of the same diameter as the bore 2 of the tubular member. The cap serves to-hold the gripping-head in engagement with the tubular member, but permits movement of the same therein similar to the ordinary jaws employed in connection with drilling-tools. The gripping-head is formed adjacent its reduced stem portion 8 with a series of ratchet-teeth 10, adapted to be engaged by the ratchet-teeth 11 of the tubular member 1 to rotate the former. The bottom of the gripping-head is recessed, as at 9, and provided with a series of ratchet-teeth 9 the object of which will presently appear.

In practical use should the drilling-tools become engages in the bottom of the well the fishing-tool justdescribed is lowered into the well until the lower end of the grippinghead engages over the top of the rope-socket, the conventional form of rope-socket having its upper end contracted, and this contracted end is adapted to seat in the recess 9 when the fishing-tool is lowered into engagement with the drilling-tool. The head 12 of the fishing-tool is then elevated and suddenly precipitated upon the gripping-head to drive the teeth 9 into the ropesocket, this movement being permitted by the connection established between the tubular member 1 and the stem portion 8 of the gripping-head. By

, ping-head 9, thereby rotating the rope-socket and permitting of its removal from the well. This same operation is performed upon the jars to disengage them from the auger-stem. This operation is continued until the bit is reached, and in case the bit cannot be removed the hole is blasted to loosen the bit in order that it may be removed.

It will of course be understood that the ratchet-teeth 10 and 11 are tempered and hardened to withstand the blows which they receive while the various parts of the drillingtools are being rotated.

It is thought from the foregoing that the construction, operation, and advantages of the herein-described fishing-tool will be ap- WV hat I claim, and desire to secure by Let ters Patent, is-

1. A fishing-tool consisting of a head, a tubular member having an enlarged bore and a series of ratchet-teeth formed in its bottom, a gripping-head having a stem portion fitting into said tubular member, a cap carried by said head and fitting in said tubular member said gripping head having ratchet teeth adapted to be engaged by the first-named ratchet-teeth, the lower end of said gripping head having a recess formed therein, the bottom of said head having ratchet-teeth formed thereon, means to retain said gripping-head in engagement with said tubular member, substantially as described.

2. A fishing-tool for drilling-tools consisting of a head having a contracted portion, a tubular member screwing on the contracted portion of the head, said tubular member having a central bore enlarged at its upper end, a grip-head adapted to engage said drillingtools, said grip-head being adapted to'fit in said tubular member and carrying a removable cap fitting in the enlarged bore of the tubular member, means to rotate said gripping-head by suddenly precipitating said tubular member upon said head, substantially as described.

In testimony whereof I affiX my signature in the presence of two witnesses.

ABRAM WV. VOLF.

Witnesses:

JAMES POWELL, BERTHA F. AMMoNs. 

